GideonPotok commented on code in PR #46041:
URL: https://github.com/apache/spark/pull/46041#discussion_r1572135059
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CollationTypeCasts.scala:
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@@ -54,7 +54,7 @@ object CollationTypeCasts extends TypeCoercionRule {
case otherExpr @ (
_: In | _: InSubquery | _: CreateArray | _: ArrayJoin | _: Concat | _:
Greatest | _: Least |
- _: Coalesce | _: BinaryExpression | _: ConcatWs) =>
+ _: Coalesce | _: BinaryExpression | _: ConcatWs | _: StringLPad | _:
StringRPad) =>
Review Comment:
@uros-db That is not so, in my understanding.
`collateToSingleType` calls `getOutputCollation` and then does
`exprs.map(e => castStringType(e, st).getOrElse(e))`
`getOutputCollation`, according to the function comment blocks (verified by
me looking at the code), "will only be affected by collated StringTypes or
complex DataTypes with collated StringTypes (e.g. ArrayType)"
`castStringType` , according to the function comment blocks (verified by me
looking at the code), "casts given expression to collated StringType with id
equal to collationId only if expression has StringType in the first place."
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